"We were on our way to Thailand to see my parents, flying commercial first-class. We were under a blanket. We weren't even in one of those pod things," she says, when asked what the craziest place they've had sex is. "I feel like we should get a trophy for that."

Teigen also isn't shy about dishing on the couple's PDA.

"We're by no means freaky-deaky, but let's just say, we're open to things. We're very okay with PDA," she reveals. "When we go to a restaurant, he loves when I wear a dress, so he can do some upper-thigh rubbing."

In the new Cosmo interview, the Sports Illustrated swimsuit model explains how she got the Grammy-award winning Legend, 35, to settle down.

"I'm not going to lie. We hooked up. [When he went on tour] I left him be himself for a while. The worst thing you can do is try to lock someone like that down early on, then have them think, 'There's so much more out there,'" she explains. "I played it cool for a long time. Never once did I ask, 'What are we?' Marriage was never my goal, because I've never been very traditional. I was just happy to be with him."